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New Rickettsia species in soft ticks Ornithodoros hasei collected from bats in French Guiana
Auteur(s) : Tahir, Djamel Socolovschi, Cristina Marié, Jean-Lou Ganay, Gautier Berenger, Jean-Michel Bompar, Jean-Michel Blanchet, Denis Cheuret, Marie
Auteurs secondaires : Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE) ; Centre National de la Recherche Scientifique (CNRS) - IFR48 - Institut National de la Santé et de la Recherche Médicale (INSERM) - Aix Marseille Université (AMU) - Institut de Recherche pour le Développement (IRD) Service de Santé des Armées Aix Marseille Université (AMU) Laboratoire Hospitalo-universitaire de Parasitologie et Mycologie Médicale ; Université des Antilles et de la Guyane (UAG) - Centre hospitalier Andrée Rosemon (Cayenne) Laboratoire Hospitalo-Universitaire de Parasitologie Mycologie ; Hôpital général de Cayenne

Éditeur(s) : HAL CCSD
Résumé : International audience
In French Guiana, located on the northeastern coast of South America, bats of different species are very numerous. The infection of bats and their ticks with zoonotic bacteria, especially Rickettsia species, is so far unknown. In order to improve knowledge of these zoonotic pathogens in this French overseas department, the presence and diversity of tick-borne bacteria was investigated with molecular tools in bat ticks. In the beginning of 2013, 32 bats were caught in Saint-Jean-du-Maroni, an area close to the coast of French Guiana, and the ticks of these animals were collected. A total of 354 larvae of Argasidae soft ticks (Ornithodoros hasei) from 12 bats (Noctilio albiventris) were collected and 107 of them were analysed. DNA was extracted from the samples and quantitative real-time PCR was carried out to detect Rickettsia spp., Bartonella spp., Borrelia spp. and Coxiella burnetii. All tested samples were negative for Bartonella spp., Borrelia spp. and Coxiella burnetii. Rickettsia DNA was detected in 31 (28.9%) ticks. An almost entire (1118 base pairs long) sequence of the gltA gene was obtained after the amplification of some positive samples on conventional PCR and sequencing. A Bayesian tree was constructed using concatenated rrs, gltA, ompA, ompB, and gene D sequences. The study of characteristic sequences shows that this Rickettsia species is very close (98.3-99.8%) genetically to R. peacockii. Nevertheless, the comparative analysis of sequences obtained from gltA, ompA, ompB, rrs and gene D fragments demonstrated that this Rickettsia is different from the other members of the spotted fever group. The sequences of this new species were deposited in GenBank as Candidatus Rickettsia wissemanii. This is the first report showing the presence of nucleic acid of Rickettsia in Ornithodoros hasei ticks from South American bats. (C) 2016 Elsevier GmbH. All rights reserved.
TICKS AND TICK-BORNE DISEASES

hal-01459758
https://hal.archives-ouvertes.fr/hal-01459758
DOI : 10.1016/j.ttbdis.2016.09.004

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